ISO 13474:2009
Acoustics - Framework for calculating a distribution of sound exposure levels for impulsive sound events for the purposes of environmental noise assessment
ISO 13474:2009 specifies the framework of an engineering method for calculating a statistical distribution of sound exposure levels for impulsive sound events for the purposes of environmental noise assessment. It is applicable to impulse sounds propagating over large distances (e.g. 0,5 km to 30 km) from sources, such as mine blasting, artillery fire and bomb explosions, using conventional explosives of moderate charge mass (e.g. 0,05 kg to 1 000 kg of TNT equivalent). The effects of meteorological conditions and terrain upon sound propagation are considered.
This standard is also available from:
BS /
SS
ISO 1999:1990
Acoustics - Determination of occupational noise exposure and estimation of noise-induced hearing impairment
Prescribes a practical relation for these quanitities expressed as A-weighted noise level in dB and duration of exposure within a normal working week (40 hours) and the percentage of personnel that is to be expected to obtain a raised hearing threshold of 25 dB or more as a result of this exposure, averaged from 500, 1000 and 2000 Hz.
This standard is also available from:
SS
ISO 5131:1996
Acoustics -- Tractors and machinery for agriculture and forestry -- Measurement of noise at the operator's position -- Survey method
Describes a method for the measurement of the noise at the position of the operator(s) of a tractor or machine used in agriculture and forestry. Provides information to avoid hearing risks of the operators. Replaces the first edition.
This standard is also available from:
BS /
SS
ISO 9612:2009
Acoustics - Determination of occupational noise exposure - Engineering method
ISO 9612:2009 specifies an engineering method for measuring workers' exposure to noise in a working environment and calculating the noise exposure level. ISO 9612:2009 deals with A-weighted levels but is applicable also to C-weighted levels. Three different strategies for measurement are specified. The method is useful where a determination of noise exposure to engineering grade is required, e.g. for detailed noise exposure studies or epidemiological studies of hearing damage or other adverse effects. The measuring process requires observation and analysis of the noise exposure conditions so that the quality of the measurements can be controlled. ISO 9612:2009 provides methods for estimating the uncertainty of the results. ISO 9612:2009 is not intended for assessment of masking of oral communication or assessment of infrasound, ultrasound and non-auditory effects of noise. It does not apply to the measurement of the noise exposure of the ear when hearing protectors are worn. Results of the measurements performed in accordance with ISO 9612:2009 can provide useful information when defining priorities for noise control measures.
This standard is also available from:
BS /
DIN /
ON /
SS
ANSI S3.44-1996 (R 2006)
Determination of Occupational Noise Exposure and Estimation of Noise-Induced Hearing Impairment (with Erratum)
The standard is an adaptation of the international standard ISO 1999:1990(E) of the same name. Unlike the international standard, this standard allows assessment of noise exposure using a time/intensity trading relation other than a 3-decibel increase per halving of exposure time. This standard presents, in statistical terms, the relationship between noise exposures and changes in hearing threshold levels for a noiseexposed population. This standard can also be applied to the calculation of the risk of incurring hearing handicap from sustained daily exposure to noise. Guidance is provided as to the measurement of noise exposure.
BS 5330:1976
Method of test for estimating the risk of hearing handicap due to noise exposure (British Standard)
Specifies a relationship between noise exposure and the expected incidence of hearing handicap. The exposure is derived from the equivalent continuous A-weighted sound level during an 8-hour working day, whilst the handicap is taken as 30 dB referred to a specified audiometric zero.
BS 5502-32:1990
Buildings and structures for agriculture. Guide to noise attenuation (British Standard)
Guidance on aspects of controlling noise pollution in relation to the design and construction of agricultural buildings and structures. Does not cover specific equipment installed and used in agricultural buildings.
CAN/CSA Z107.56-2006 (R2011)
CAN/CSA-Z107.56-06 (R2011) - Procedures for the Measurement of Occupational Noise Exposure
Update #1 was published as notification that this is now a National Standard of Canada Preface This is the third edition of CSA Z107.56, Procedures for the measurement of occupational noise exposure, which is part of the CSA Z107 series of Standards on acoustics and noise control. It supersedes the previous editions published in 1994 and 1986. 1. Scope 1.1 This Standard describes procedures for determining the occupational noise exposure level of workers (Lex,T) using sampling techniques. Lex,T represents the long-term noise exposure of workers and is calculated from measurements of Leq,t in the workplace. Notes: (1) Noise exposure has been expressed as % dose in the past. However, the use of Leq,t is recommended, as it is more convenient and less likely to be misunderstood. (2) The procedures in this Standard normally form part of any occupational hearing conservation program. Users of this Standard should be proficient in noise measurement. 1.2 This Standard provides procedures for measuring the occupational noise exposure from all types of noise, e.g., continuous noise, tonal noise, and impulsive noise. All types of noise (including impulsive noise) are included in a single equivalent sound level for an individual or group. 1.3 This Standard can be used to determine the noise exposure level of individuals (Lex,T) or extended to groups (LGroup) with similar noise exposures. It can also be used to measure the average noise (Leq,t) from a given job or activity (e.g., operating a particular machine). 1.4 This Standard provides for measurements in terms of equivalent sound level, Leq,t (3 dB exchange rate), and calculation of noise exposure level, Lex,T, regardless of noise type. Procedures for calculating related quantities, such as % dose, are provided. This Standard may also be used to measure LOSHA (5 dB exchange rate) and calculate the associated indices as shown in Annex D. In this case, the results may not be a good representation of exposure to impulsive noise. Note: Measurements taken in Leq cannot be converted to LOSHA , or vice versa, unless the time distribution of sound levels is known. 1.5 This Standard provides procedures to determine the noise exposure level of workers with a given precision. In certain cases, the user is only interested in determining that a worker.s exposure is above or below the criterion level. Therefore, the procedures in this Standard can be less rigorously applied when the noise exposure level is either far above or far below the criterion level. 1.6 In CSA Standards, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; "should" is used to express a recommendation or that which is advised but not required; "may" is used to express an option or that which is permissible within the limits of the standard; and "can" is used to express possibility or capability. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.
AS/NZS 1269.0:2005
Occupational noise management - Overview and general requirements (FOREIGN STANDARD)
Provides an overview and general requirements for the occupational noise management series of Standards.
AS/NZS 1269.1:2005
Occupational noise management - Measurement and assessment of noise immission and exposure (FOREIGN STANDARD)
Sets out requirements for, and provides guidance on, the types of noise assessments which may be necessary and suitable noise measuring instruments to carry them out. The procedures for noise measurement are also included.
This standard is also available from:
AS Amendment 2005
AS/NZS 1269.2:2005
Occupational noise management - Noise control management (FOREIGN STANDARD)
Sets outs requirements and guidance on the management of noise control in occupational settings and applies to all types of workplaces and to all types of sounds.
AS/NZS 1269.3:2005
Occupational noise management - Hearing protector program (FOREIGN STANDARD)
Specifies administrative responsibilities associated with a hearing protector program; the selection, use and maintenance of various types of hearing protectors; and training and motivation in regard to hearing protector programs.
AS/NZS 1269.4:2005
Occupational noise management - Auditory assessment (FOREIGN STANDARD)
Sets out procedures and requirements for air conduction pure tone audiometry without masking that are applicable to individuals whose hearing sensitivity might be adversely affected by occupational noise exposure or ototoxic agents.
This standard is also available from:
AS Amendment 2005
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